#contenu_erreur {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  font-size: 1.2em;
  color: #333;
}
#contenu_erreur p {
  max-width: 90%;
  text-align: center;
}
#contenu_erreur a {
  text-decoration: none;
  color: #5700a8;
  font-style: italic;
}